Synthesis and binding to plant lectins of sulfur-containing analogues of βGal1,3αGalNAc (T-antigen)
作者:Hansjörg Streicher、Walther Schmid、Irmgard Wenzl、Christian Fiedler、Hanspeter Kählig、Frank M Unger
DOI:10.1016/s0960-894x(00)00229-8
日期:2000.6
Analogues of the tumor-associated T-antigen (beta Gal1,3 alpha GalNAc) containing 4,6-epidithio and 4,6-thietan modifications were synthesized from the alpha-allyl glycoside of beta Gal alpha 1,3GlcNAc via suitable thiocyanate derivatives. Binding to three leguminous lectins as model systems was investigated in an enzyme-linked lectin assay (ELLA) and IC50 values comparable to the corresponding natural disaccharides T-antigen, lactose and N-acetyllactosamine were found. (C) 2000 Elsevier Science Ltd. All rights reserved
Synthesis of Sulfur-Containing Analogues of ΑGalNAc (Tn-Antigen) and ΒGal1,3ΑGalNAc (T-Antigen)
作者:Irmgard Wenzl、Norbert Neuwirth、Alexander G. Hedenetz、Christian Fiedler、Hansjörg Streicher、Frank M. Unger、Walther Schmid
DOI:10.1007/s007060200026
日期:2002.4.1
stepwise fashion, using mesylate as the leaving group at C-6 and triflate as the leaving group at C-4 in the reducing carbohydrate moiety. The synthesis of the thioanhydro analogue was achieved by introducing a thiocyanate group at C-6 into the glucose moiety, followed by subsequent displacement of a mesylate group at C-4 under inversion of configuration utilizing sodium methoxide.